EP1339253B1 - Appareil de communication portable et procédé de son utilisation - Google Patents

Appareil de communication portable et procédé de son utilisation Download PDF

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Publication number
EP1339253B1
EP1339253B1 EP03100288.4A EP03100288A EP1339253B1 EP 1339253 B1 EP1339253 B1 EP 1339253B1 EP 03100288 A EP03100288 A EP 03100288A EP 1339253 B1 EP1339253 B1 EP 1339253B1
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EP
European Patent Office
Prior art keywords
portable communication
communication device
time interval
authentication
authentication features
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03100288.4A
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German (de)
English (en)
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EP1339253A3 (fr
EP1339253A2 (fr
Inventor
Peter Neumann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
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Filing date
Publication date
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Publication of EP1339253A2 publication Critical patent/EP1339253A2/fr
Publication of EP1339253A3 publication Critical patent/EP1339253A3/fr
Application granted granted Critical
Publication of EP1339253B1 publication Critical patent/EP1339253B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H04M1/673—Preventing unauthorised calls from a telephone set by electronic means the user being required to key in a code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0861—Network architectures or network communication protocols for network security for authentication of entities using biometrical features, e.g. fingerprint, retina-scan
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/61—Time-dependent

Definitions

  • the present invention relates to a portable communication device, in particular a mobile radio device, and a method for operating the same.
  • the present invention relates to a portable communication device, which can be set to a standby state by means of an activation device, such as a power-on button, for entering one or more authentication features of the user of the portable communication device.
  • a conventional communication device in the form of a mobile device in particular according to the GSM (Global System for Mobile Communications) standard, has a user-specific card, a so-called SIM (SIM: Subscriber Identity Module) for identifying or authenticating the rightful user. Card to which a specific code, the PIN (Personal Identification Number) is assigned.
  • SIM Subscriber Identity Module
  • PIN Personal Identification Number
  • SIM Subscriber Identity Module
  • a user of a mobile device is traveling, he stows his mobile device usually in a bag of his clothes or a handbag that may contain other items.
  • the mobile device By walking or other movements while the mobile device can either come into contact with the items in the bag or with the bag itself, it may happen that while the power button of the mobile device is activated and thus the mobile device is set to a standby state, by asking the user to enter the correct PIN.
  • a lighting device is also activated after activating the standby state or pressing a button of the mobile device keyboard in many mobile devices.
  • the US 2001/034247 A1 discloses placing a communication device in an off state when a predetermined number of incorrect password entries are reached.
  • a portable communication device comprises an activation device, such as a power-on button, for transferring the portable communication device into a standby state, which is used to input one or more authentication features of a user.
  • the portable communication device can be switched from a switched-off state to the standby state in which the power supply of the device is activated in order to initiate an authentication procedure.
  • the portable communication device has an authentication device for inputting the one or more authentication features to bring the portable communication device into an operating state when a correct set of authentication features, for example from the authentication device, recognized and optionally confirmed (by pressing a confirmation button) ,
  • a time measuring device is provided for measuring a time interval that has elapsed since the activation of the standby state.
  • a deactivation device is then used to set the portable communication device in a switched-off state, if not within a first predetermined time interval, a correct set of authentication features is detected and optionally confirmed.
  • the set of authentication features may consist of one or more correct authentication features.
  • a portable communication device has an activation device, which, as described above, serves to transfer the portable communication device, in particular from a switched-off state, into a standby state, which is used to input one or more authentication features of a user , Furthermore, the portable communication device has an authentication device for inputting the one or more authentication features into an intermediate memory in order to bring the portable communication device into an operating state, when a correct set of authentication features, for example from the authentication device, are recognized in the buffer and optionally (by Pressing a confirmation key) is confirmed.
  • a time measuring device is provided for measuring a time interval that has elapsed since the activation of the standby state.
  • Characteristic of this aspect of the invention is a deletion device for deleting the authentication features stored in the buffer memory, unless within a second predetermined time interval a correct set of authentication features is recognized in the buffer and, if necessary, acknowledged. That is, a portable communication device according to this aspect of the invention is mainly for preventing erroneous authentication. For example, by means of the activation device the portable communication device placed in the standby state, and further unintentionally any authentication features, such as digits, characters, symbols, etc. entered by the authentication device in the cache of the portable communication device, these input authentication features after the predetermined second time interval, for example in the from 1 to 3 minutes, cleared again from the cache.
  • the entered authentication features are also deleted from the display in the event of the presence of a display.
  • an authentication device configured as a keypad to enter a PIN
  • a confirmation key such as an "OK”.
  • Key or "#" key with a PIN consisting of too few digits, usually not rated as intended misidentifications, thereby not causing a jamming of the mobile device.
  • the portable communication device according to the second aspect of the invention also prevents blocking of the mobile device with high probability.
  • a portable communication device as a combination of the first two illustrated aspects. It is possible, after activation of the standby state after elapsing of the second predetermined time interval, to cause a clearing of the buffer and to transfer after the lapse of the first time interval, the portable communication device in an off state. If, according to an advantageous embodiment, the first and second predetermined time intervals have the same value, then, after the passage of this time interval value, both the buffer and the buffer are cleared portable communication device placed in a power off state.
  • the first predetermined time interval has a value greater than the second predetermined interval, so that first, ie after elapse of the second predetermined time interval, the buffer is cleared and then after the lapse of the first predetermined time interval, the portable communication device into one switched off (in the event that no correct set of authentication features has been entered).
  • the authentication device comprises a keyboard, by means of which specific alphanumeric characters and / or symbols can be entered as authentication features.
  • the keyboard may be used to input a PIN (personal identification number) of a user, as is conventionally the case for portable communication devices in the implementation of a mobile telephone according to the GSM standard.
  • PIN personal identification number
  • Such a PIN is assigned to a SIM card, which receives the user as a mobile customer from its network operator.
  • UMTS Universal Mobile Telecommunication Service
  • UICC Universal Integrated Circuit Card
  • USIM UMTS Subscriber Identity Module
  • the authentication device may further comprise a biometric sensor arrangement for detecting biometric features of a user as authentication features.
  • the biometric sensor arrangement may comprise an optical sensor element or a pressure-sensitive sensor element which especially for capturing a fingerprint of a user.
  • PDA Personal Digital Assistant
  • a method of operating a portable communication device comprising the steps of: transferring the portable communication device to a standby state for inputting one or more authentication features of a user; starting the measurement of a time interval since activating the ready state; and placing the portable communication device in an off state unless a correct set of authentication features consisting of one or more authentication features has been input to the portable communication device within a first predetermined measured time interval.
  • a method of operating a portable communication device includes a step of transitioning the portable communication device to a standby state for inputting one or more authentication features of a user, and a step of starting to measure a time interval since activating the stand-by state.
  • the method of this aspect of the invention is characterized by a step of entering the one or more authentication features into a temporary storage of the portable communication device to bring the portable communication device into an operative state when a correct set of authentication features is recognized in the cache, as well by a step of deleting the authentication features stored in the cache memory unless a correct set of authentication features is recognized in the cache memory within a second predetermined time interval.
  • the first predetermined time interval may have the same value as the second predetermined time interval, wherein it is particularly advantageous if the first predetermined time interval has a higher value than the second predetermined time interval.
  • FIG. 1 there is shown a mobile telephone MFG intended to represent a portable communication device for explaining the present invention.
  • the mobile telephone MFG has a control device ST, in particular a Microprocessor and a program memory has.
  • program codes may be contained in the program memory, the processing of which by means of the control device ST implements the present invention.
  • the control device ST is connected to a time measuring device ZME, which is used in particular for measuring the time which has elapsed after activation of a standby state of the mobile telephone MFG.
  • the control device ST is connected to a display DSP, which can be designed, for example, as an LCD (Liquid Crystal Display LCD) and can be used to display letters, numbers, symbols, etc.
  • LCD Liquid Crystal Display LCD
  • the display is currently the prompt "PIN:", which should cause the user of the mobile phone MFG to enter the PIN assigned to him (personal identity number).
  • the control device ST is further connected to a buffer ZWS, for example in the execution of a random access memory or RAM memory, are temporarily stored in the numerals or characters as components of a user authentication, such as the PIN (at least until by pressing a confirmation key as the "#" key, the authentication code entered by the user is released for review by the mobile phone MFG).
  • a buffer ZWS for example in the execution of a random access memory or RAM memory
  • the control device ST, the buffer ZWS, the display DSP and the keyboard TAS can cooperate in the function of an authentication device.
  • the correct authentication code here depends on the user-specific identity card connected to the mobile telephone MFG, such as the SIM card when using a mobile phone according to the GSM standard (for reasons of clarity in the following description of authentication code instead of a set of authentication features consisting one or more authentication features spoken).
  • the control device ST is connected to a keyboard TAS.
  • the keyboard TAS has twelve keys in this embodiment.
  • the keyboard TAS has a respective 1-key, 2-key, 3-key, 4-key, 5-key, 6-key, 7-key, 8-key, 9-key, * -key, 0-key and # key up.
  • the control device ST is further connected to an on / off button EA, which serves on the one hand, when the mobile phone MFG is off, to activate the power supply and to put the mobile phone first in a standby state by an authentication code or the PIN from User can be entered.
  • an on / off button EA which serves on the one hand, when the mobile phone MFG is off, to activate the power supply and to put the mobile phone first in a standby state by an authentication code or the PIN from User can be entered.
  • an authentication code or the PIN from User can be entered.
  • such a ready state is already in FIG. 1 is displayed by the prompt "PIN:" is already displayed on the display DSP to enter the user PIN.
  • the on / off button EA can also serve to put the mobile from the standby state or an operating state, which will be explained below, in the off state by the mobile phone MFG has no more functionality.
  • the control device ST, the time measuring device ZME and the buffer ZWS are shown in dashed lines, since they are normally provided inside the mobile telephone MFG and are not visible to the user.
  • the mobile telephone MFG further comprises a microphone MIK and a speaker LS, which are used in the conventional telephoning (in the operating state) in which voice signals are transmitted. Furthermore, the mobile telephone MFG has an antenna ANT, which is connected to a radio module (not shown), which serves to transmit voice and / or data via an air interface to a base station which forms part of a communication network or from this to recieve.
  • the mobile telephone MFG and the communication network including the base station (s) can operate according to, for example, the GSM (Global System For Mobile Communications) standard or the UMTS (Universal Mobile Telecommunication Service) standard.
  • FIG. 2 Now, a flowchart illustrating a method of operating the mobile telephone MFG is shown.
  • the mobile phone MFG is in an off state in which the power supply to the essential functional elements of the mobile phone, such as the keyboard TAS and the display DSP, etc., is turned off.
  • a user wishing to put the mobile phone MFG into operation first operates the on / off key EA in step S10 to put the mobile phone MFG in a standby state by activating the power supply and inputting an authentication code or a PIN is enabled by a user via the keyboard TAS.
  • a measurement of the time T indicating the time which has elapsed since the standby state was activated is started in the time measuring device ZME in step S20.
  • step S30 it is assumed that, for example, unfavorable placement of the mobile phone MFG in a pocket of the user unintentionally press any keys of the keyboard TAS, so that any characters are entered into the buffer ZWS and appear in the display DSP accordingly. It should be noted, however, that it is not necessary for the execution of the following steps S40 and S50 that any characters or digits have been entered in the buffer ZWS.
  • any characters or numerals have been entered (by unfavorable storage) into the buffer ZWS and that the time measuring means ZME has measured a time T which is greater than a predetermined time interval T2. Furthermore, it is assumed that the user at this time has not entered a correct authentication code consisting of one or more authentication features, such as the PIN and released by a confirmation key, such as the # key, for checking by the mobile telephone MFG (ie in particular its control device ST or in general the authentication device). In this case, ie when T> T2, all characters or digits entered in the buffer memory up to this point in time are deleted by the control device ST from the buffer ZWS and taken accordingly by the display DSP. Such a task, ie, the deletion of the buffer ZWS or the display DSP, can be performed by the control device ST with the function of a deletion device.
  • the time T2 which is advantageously in the range of 1 to 3 minutes, is shorter than the time T1 mentioned in step S50, which may be in the range of 2 to 6 minutes (it should be noted that the times for the times T1 and T2 are exemplary and can be adapted as needed).
  • the method of operating the mobile station returns from step S40 back to step S30 by awaiting the input of authentication features, ie, characters.
  • Step S40 is performed repeatedly to clear the buffer ZWS and then, in turn, to step S30 to await the input of authentication features. Finally, if a time T> T1 is measured by the time measuring device ZME, and if the user has not yet entered a correct authentication code or a correct PIN, the mobile radio device is switched off or put into a switched-off state in step S50.
  • Such a task ie the switching off or deactivating of the mobile radio MFG, can be performed by the control device ST with the function of a deactivation device. In this way, an unnecessary power supply to certain components of the mobile device, as to the keyboard, the display, or a lighting device to just mentioned components, etc., avoided, and extends the operating time of the mobile device MFG.
  • the mobile telephone MFG If the user of the mobile telephone MFG enters the correct authentication code or the correct PIN in step S30, in which the input of the authentication code is expected, the mobile telephone is put into an operating state in which the conventional features of the mobile telephone, such as telephoning, etc ., the user will be enabled.
  • the time measurement of the time measuring device ZME In the transition from the standby state to the operating state, i. after entering the correct PIN, the time measurement of the time measuring device ZME is stopped, so that during the operating state no time-limited shutdown of the mobile phone MFG takes place as in the standby state.
  • step S40 can be omitted, so that the mobile telephone MFG is put into an off state directly after a time interval T1 has been exceeded. It is also according to another embodiment of in FIG. 2 is possible, that the step S50 is omitted, so that during the standby state no automatic shutdown of the mobile phone takes place, but only at certain time intervals (T2) deletion of the cache or the display takes place, to avoid a faulty authentication attempt.
  • T2 time intervals
  • a sensor arrangement may be arranged on the mobile telephone MFG for entering a PIN as a set of authentication features or as an authentication code by means of which biometric features, such as a fingerprint, can be detected.
  • a portable communication device is not limited to mobile phones or cordless telephones, but may also be in the form of a (small) portable computer such as an organizer or personal digital assistant (PDA) can.
  • a portable computer such as an organizer or personal digital assistant (PDA) can.
  • PDA personal digital assistant

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Claims (14)

  1. Un dispositif de communication portatif comprenant les caractéristiques suivantes :
    un dispositif d'activation (EA) destiné au transfert du dispositif de communication portatif vers un état en attente qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    un dispositif d'authentification (TAS, ST, DSP, ZWS) destiné à l'entrée des une ou plusieurs caractéristiques d'authentification afin de placer le dispositif de communication portatif (MFG) dans un état opérationnel après l'identification d'un ensemble correct de caractéristiques d'authentification,
    caractérisé par
    un dispositif de mesure de temps (ZME) destiné à la mesure d'un intervalle temporel (T) écoulé depuis l'activation de l'état en attente,
    un dispositif de désactivation (ST) destiné au placement du dispositif de communication portatif dans un état désactivé sauf si un ensemble correct de caractéristiques d'authentification a été identifié à l'intérieur d'un premier intervalle temporel prédéterminé (T1).
  2. Un dispositif de communication portatif, en particulier selon la Revendication 1, comprenant les caractéristiques suivantes :
    un dispositif d'activation (EA) destiné au transfert du dispositif de communication portatif vers un état en attente qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    un dispositif d'authentification (TAS, ST, DSP, ZWS) destiné à l'entrée des une ou plusieurs caractéristiques d'authentification dans une mémoire tampon (ZWS) afin de placer le dispositif de communication portatif (MFG) dans un état opérationnel après l'identification d'un ensemble correct de caractéristiques d'authentification dans la mémoire tampon,
    caractérisé par
    un dispositif de mesure de temps (ZME) destiné à la mesure d'un intervalle temporel écoulé depuis l'activation de l'état en attente,
    un dispositif de suppression (ST) destiné à la suppression des caractéristiques d'authentification conservées en mémoire dans la mémoire tampon sauf si un ensemble correct de caractéristiques d'authentification a été identifié dans la mémoire tampon à l'intérieur d'un deuxième intervalle temporel prédéterminé (T2).
  3. Un dispositif de communication portatif, comprenant les caractéristiques suivantes :
    un dispositif d'activation (EA) destiné au transfert du dispositif de communication portatif vers un état en attente qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    un dispositif d'authentification (TAS, ST, DSP, ZWS) destiné à l'entrée des une ou plusieurs caractéristiques d'authentification afin de placer le dispositif de communication portatif (MFG) dans un état opérationnel après l'identification d'un ensemble correct de caractéristiques d'authentification,
    caractérisé par
    un dispositif de mesure de temps (ZME) destiné à la mesure d'un intervalle temporel (T) écoulé depuis l'activation de l'état en attente,
    un dispositif de désactivation (ST) destiné au placement du dispositif de communication portatif dans un état désactivé sauf si un ensemble correct de caractéristiques d'authentification a été identifié à l'intérieur d'un premier intervalle temporel prédéterminé (T1),
    un dispositif de suppression (ST) destiné à la suppression des caractéristiques d'authentification conservées en mémoire dans la mémoire tampon sauf si un ensemble correct de caractéristiques d'authentification a été identifié dans la mémoire tampon à l'intérieur d'un deuxième intervalle temporel prédéterminé (T2),
    où le premier intervalle temporel prédéterminé (T1) possède une valeur supérieure au deuxième intervalle temporel prédéterminé (T2).
  4. Le dispositif de communication portatif selon la Revendication 1 ou 2, où le premier intervalle temporel prédéterminé (T1) possède une valeur supérieure au deuxième intervalle temporel prédéterminé (T2).
  5. Le dispositif de communication portatif selon les Revendications 1 et 2, où les premier (T1) et deuxième (T2) intervalles temporels prédéterminés possèdent la même valeur.
  6. Le dispositif de communication portatif selon l'une quelconque des Revendications 1 à 5, où le dispositif d'authentification (TAS, ST, DSP, ZWS) comprend un clavier (TAS) au moyen duquel des caractères alphanumériques et/ou des symboles spécifiques peuvent être entrés en tant que caractéristiques d'authentification.
  7. Le dispositif de communication portatif selon l'une quelconque des Revendications 1 à 5, où le dispositif d'authentification (TAS, ST, DSP, ZWS) comprend un agencement de capteur biométrique destiné à la détection de caractéristiques biométriques d'un utilisateur en tant que caractéristiques d'authentification.
  8. Le dispositif de communication portatif selon la Revendication 7, où l'agencement de capteur biométrique comprend un élément capteur destiné à la détection d'une empreinte digitale d'un utilisateur.
  9. Le dispositif de communication portatif selon l'une quelconque des Revendications 1 à 8, où le premier intervalle temporel prédéterminé (T1) se situe à l'intérieur de la plage de 2 à 6 minutes et le deuxième intervalle temporel prédéterminé (T2) se situe à l'intérieur de la plage de 1 à 3 minutes.
  10. Le dispositif de communication portatif selon l'une quelconque des Revendications 1 à 9, qui est configuré sous la forme d'un dispositif radio mobile (MFG) ou d'un ordinateur portatif.
  11. Le dispositif de communication portatif selon la Revendication 10, qui est configuré sous la forme d'un dispositif radio mobile fonctionnant selon la norme GSM ou UMTS.
  12. Un procédé d'exploitation d'un dispositif de communication portatif comprenant les opérations suivantes :
    le transfert du dispositif de communication portatif vers un état en attente (S10) qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    le démarrage de la mesure (S20) d'un intervalle temporel depuis l'activation de l'état en attente,
    le placement du dispositif de communication portatif dans un état désactivé (S50) sauf si un ensemble correct de caractéristiques d'authentification se composant d'une ou de plusieurs caractéristiques d'authentification a été entré dans le dispositif de communication portatif à l'intérieur d'un premier intervalle temporel mesuré prédéterminé (T1).
  13. Un procédé d'exploitation d'un dispositif de communication portatif, en particulier selon la Revendication 11, comprenant les opérations suivantes :
    le transfert du dispositif de communication portatif vers un état en attente (S10) qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    le démarrage de la mesure d'un intervalle temporel depuis l'activation de l'état en attente (S20),
    l'entrée des une ou plusieurs caractéristiques d'authentification dans une mémoire tampon du dispositif de communication portatif (S30) afin de placer le dispositif de communication portatif dans un état opérationnel lorsqu'un ensemble correct de caractéristiques d'authentification est identifié dans la mémoire tampon,
    la suppression des caractéristiques d'authentification conservées en mémoire dans la mémoire tampon (S40) sauf si un ensemble correct de caractéristiques d'authentification est identifié dans la mémoire tampon à l'intérieur d'un deuxième intervalle temporel prédéterminé (T2).
  14. Un procédé d'exploitation d'un dispositif de communication portatif, comprenant les opérations suivantes :
    le transfert du dispositif de communication portatif vers un état en attente (S10) qui sert à l'entrée d'une ou de plusieurs caractéristiques d'authentification d'un utilisateur,
    le démarrage de la mesure (S20) d'un intervalle temporel depuis l'activation de l'état en attente,
    la suppression des caractéristiques d'authentification conservées en mémoire dans la mémoire tampon (S40) sauf si un ensemble correct de caractéristiques d'authentification est identifié dans la mémoire tampon à l'intérieur d'un deuxième intervalle temporel prédéterminé (T2),
    le placement du dispositif de communication portatif dans un état désactivé (S50) sauf si un ensemble correct de caractéristiques d'authentification se composant d'une ou de plusieurs caractéristiques d'authentification a été entré dans le dispositif de communication portatif à l'intérieur d'un premier intervalle temporel prédéterminé (T1),
    où le premier intervalle temporel prédéterminé (T1) possède une valeur supérieure au deuxième intervalle temporel prédéterminé (T2).
EP03100288.4A 2002-02-25 2003-02-11 Appareil de communication portable et procédé de son utilisation Expired - Lifetime EP1339253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10207978A DE10207978A1 (de) 2002-02-25 2002-02-25 Tragbares Kommunikationsgerät und Verfahren zum Betreiben desselben
DE10207978 2002-02-25

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EP1339253A2 EP1339253A2 (fr) 2003-08-27
EP1339253A3 EP1339253A3 (fr) 2006-03-22
EP1339253B1 true EP1339253B1 (fr) 2017-05-17

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JP4131229B2 (ja) 2003-11-25 2008-08-13 日本電気株式会社 折り畳み式携帯電話機及び折り畳み式携帯電話機のロック解除方法
DE102004042625A1 (de) * 2004-07-02 2006-02-16 Dieter Effmert Mobiltelefon mit Missbrauchssicherung

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DE19645937B4 (de) * 1996-11-07 2007-10-04 Deutsche Telekom Ag Verfahren und System zum personenabhängigen Steuern einer Telekommunikations-Endeinrichtung
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